Product comparison · 2 internal hard drives

Seagate Constellation ST9250612NS internal hard drive vs Seagate Constellation ST9500622SS internal hard drive

Key differences

HDD capacity
- Constellation ST9250612NS internal hard drive:250 GB
- Constellation ST9500622SS internal hard drive:500 GB
Interface
- Constellation ST9250612NS internal hard drive:Serial ATA
- Constellation ST9500622SS internal hard drive:SAS
HDD number of heads
- Constellation ST9250612NS internal hard drive:2
- Constellation ST9500622SS internal hard drive:4
Read seek time
- Constellation ST9250612NS internal hard drive:7.5 ms
- Constellation ST9500622SS internal hard drive:8.5 ms
Write seek time
- Constellation ST9250612NS internal hard drive:8.5 ms
- Constellation ST9500622SS internal hard drive:9.5 ms
Width
- Constellation ST9250612NS internal hard drive:69.8 mm
- Constellation ST9500622SS internal hard drive:70 mm
Depth
- Constellation ST9250612NS internal hard drive:100 mm
- Constellation ST9500622SS internal hard drive:14.8 mm
Height
- Constellation ST9250612NS internal hard drive:15 mm
- Constellation ST9500622SS internal hard drive:100.5 mm

Differences highlightedShow differences only

Comparison of ST9250612NS, ST9500622SS
33 specifications	A Seagate Constellation ST9250612NS internal hard drive Model ST9250612NS View product	B Seagate Constellation ST9500622SS internal hard drive Model ST9500622SS View product
Features5 differ
HDD capacityDiffers	250 GB	500 GB
HDD speed	7200 RPM	7200 RPM
HDD size	2.5"	2.5"
InterfaceDiffers	Serial ATA	SAS
Storage drive buffer size	64 MB	64 MB
HDD number of headsDiffers	2	4
Read seek timeDiffers	7.5 ms	8.5 ms
Write seek timeDiffers	8.5 ms	9.5 ms
Track to track seek timeKnown for one	0.44 ms	Unknown — not stated by the source
Average latency	4.16 ms	4.16 ms
Bytes per sector	512	512
Start/stop cycles	300000	300000
Component forKnown for one	Unknown — not stated by the source	Server/workstation
Poweridentical
Operating voltage	5 V	5 V
Start-up current	2 A	2 A
Operational conditionsidentical
Operating temperature (T-T)	5 - 60 °C	5 - 60 °C
Storage temperature (T-T)	-40 - 70 °C	-40 - 70 °C
Operating relative humidity (H-H)	5 - 95%	5 - 95%
Storage relative humidity (H-H)	5 - 95%	5 - 95%
Operating vibration	0.5 G	0.5 G
Non-operating vibration	3 G	3 G
Operating altitude	-60.96 - 3048 m	-60.96 - 3048 m
Non-operating altitude	-60.96 - 12192 m	-60.96 - 12192 m
Operating shock	70 G	70 G
Non-operating shock	400 G	400 G
Weight & dimensions4 differ
WidthDiffers	69.8 mm	70 mm
DepthDiffers	100 mm	14.8 mm
HeightDiffers	15 mm	100.5 mm
WeightDiffers	179 g	183 g
Other features1 differ
Data transfer rate	4.69 Gbit/s	4.69 Gbit/s
Disks included quantityDiffers	1 pc(s)	2 pc(s)
Internal	Yes	Yes
Plug and PlayKnown for one	Yes	Unknown — not stated by the source

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.